Andyrobertsite (w. calcioandyrobertsite and zincolivenite)

TSNB390
Specimen
Baughart, R.Pinch, W.W.
Exhibit 1. Andyrobertsite (w. calcioandyrobertsite and zincolivenite); 40 mm.
Exhibit 1. Andyrobertsite (w. calcioandyrobertsite and zincolivenite); 40 mm.
Image Credit: John Schneider
Exhibit 2. 30 mm field of view.
Exhibit 2. 30 mm field of view.
Image Credit: John Schneider
Exhibit 3.
Exhibit 3.
Image Credit: John Schneider
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Specimen Title

Andyrobertsite (w. calcioandyrobertsite and zincolivenite)

Associated Minerals

calcioandyrobertsite; zincolivenite

Principal Mineral

Andyrobertsite

Size

Miniature; 40mm

Location in the Mine

First oxidation zone (?)

Provenance

Pinch, W.W.; Baughart, R.

Collection

Private Collection

Entry Number

Specimen; TSNB390

Description

Platy electric-blue crystals comprising lamellar intergrowths of andyrobertsite and calcioandyrobertsite, associated with green zincolivenite.

This is the specimen from which both andyrobertsite and calcioandyrobertsite were first described (Cooper et al. 1999). It originally belonged to Tsumeb mining engineer Richard Baughart and is believed to have been collected circa 1950. It changed hands several times before being purchased by Bill Pinch at the Denver mineral show in 1996, labelled as "zinc-deficient keyite". Analysis showed the platy blue material to comprise intergrowths of two minerals new to science. Exhibit 3 shows Pinch's specimen label.